I've been in love with アホガール ever since the anime premiered, and I do own two volumes of the manga as well. I find the humor amazing and I love the female protagonist for being such a silly-stupid airhead! But as other readers have pointed out in their reviews, the language used doesn't really make アホガール suitable for learning Japanese.
Recommended if you're into comedy and will be reading it for the laughs, rather than as a way of actively studying!
A must-read for everyone
The number 1 must read manga for anyone learning Japanese. You'll not only pick up useful expressions, expand your vocabulary and practice your Japanese in a very natural way, but also learn and see a lot of what the everyday life in Japan looks like.